17121689338 has 16 divisors (see below), whose sum is σ = 27690422760. Its totient is φ = 7893086976.

The previous prime is 17121689323. The next prime is 17121689353. The reversal of 17121689338 is 83398612171.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (17121689323) and next prime (17121689353).

It can be written as a sum of positive squares in 4 ways, for example, as 13885558569 + 3236130769 = 117837^2 + 56887^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17121689291 and 17121689300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361923 + ... + 406486.

Almost surely, 2^17121689338 is an apocalyptic number.

17121689338 is a deficient number, since it is larger than the sum of its proper divisors (10568733422).

17121689338 is a wasteful number, since it uses less digits than its factorization.

17121689338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769281.

The product of its digits is 435456, while the sum is 49.

The spelling of 17121689338 in words is "seventeen billion, one hundred twenty-one million, six hundred eighty-nine thousand, three hundred thirty-eight".